1 What: /sys/bus/pci/drivers/pciback/q 1 What: /sys/bus/pci/drivers/pciback/quirks
2 Date: Oct 2011 2 Date: Oct 2011
3 KernelVersion: 3.1 3 KernelVersion: 3.1
4 Contact: xen-devel@lists.xenproject.org 4 Contact: xen-devel@lists.xenproject.org
5 Description: 5 Description:
6 If the permissive attribute is 6 If the permissive attribute is set, then writing a string in
7 the format of DDDD:BB:DD.F-REG 7 the format of DDDD:BB:DD.F-REG:SIZE:MASK will allow the guest
8 to write and read from the PCI 8 to write and read from the PCI device. That is Domain:Bus:
9 Device.Function-Register:Size: 9 Device.Function-Register:Size:Mask (Domain is optional).
10 For example:: !! 10 For example:
11 !! 11 #echo 00:19.0-E0:2:FF > /sys/bus/pci/drivers/pciback/quirks
12 #echo 00:19.0-E0:2:FF > /sys <<
13 <<
14 will allow the guest to read a 12 will allow the guest to read and write to the configuration
15 register 0x0E. 13 register 0x0E.
16 14
17 What: /sys/bus/pci/drivers/pciback/a 15 What: /sys/bus/pci/drivers/pciback/allow_interrupt_control
18 Date: Jan 2020 16 Date: Jan 2020
19 KernelVersion: 5.6 17 KernelVersion: 5.6
20 Contact: xen-devel@lists.xenproject.org 18 Contact: xen-devel@lists.xenproject.org
21 Description: 19 Description:
22 List of devices which can have 20 List of devices which can have interrupt control flag (INTx,
23 MSI, MSI-X) set by a connected 21 MSI, MSI-X) set by a connected guest. It is meant to be set
24 only when the guest is a stubd 22 only when the guest is a stubdomain hosting device model (qemu)
25 and the actual device is assig 23 and the actual device is assigned to a HVM. It is not safe
26 (similar to permissive attribu 24 (similar to permissive attribute) to set for a devices assigned
27 to a PV guest. The device is a 25 to a PV guest. The device is automatically removed from this
28 list when the connected pcifro 26 list when the connected pcifront terminates.
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